extras: tools: Only patch libtool's ltmain.in

Instead of ltmain.sh, in order to ensure all changes will used.
If ltmain.sh gets modified as well, there is no way to guarantee that
all changes to the .in file will trigger a regenetation since both file
will likely have the same modification timestamps

Refs !182

An updated version of our current libtool patchset has been pushed to
https://github.com/chouquette/libtool/tree/vlc_patches

extras/tools/libtool-2.4.6-bitcode.patch

@@ -17,22 +17,3 @@
  	# Time to change all our "foo.ltframework" stuff back to "-framework foo"
  	compile_deplibs=`$ECHO " $compile_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`
  	finalize_deplibs=`$ECHO " $finalize_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`
---- libtool-2.4.6/build-aux/ltmain.sh.orig	2019-03-06 17:18:05.690203200 +0100
-+++ libtool-2.4.6/build-aux/ltmain.sh	2019-03-06 17:21:40.825606300 +0100
-@@ -10208,16 +10208,6 @@
- 
-       case $host in
-       *-*-darwin*)
--	# Don't allow lazy linking, it breaks C++ global constructors
--	# But is supposedly fixed on 10.4 or later (yay!).
--	if test CXX = "$tagname"; then
--	  case ${MACOSX_DEPLOYMENT_TARGET-10.0} in
--	    10.[0123])
--	      func_append compile_command " $wl-bind_at_load"
--	      func_append finalize_command " $wl-bind_at_load"
--	    ;;
--	  esac
--	fi
- 	# Time to change all our "foo.ltframework" stuff back to "-framework foo"
- 	compile_deplibs=`$ECHO " $compile_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`
- 	finalize_deplibs=`$ECHO " $finalize_deplibs" | $SED 's% \([^ $]*\).ltframework% -framework \1%g'`

extras/tools/libtool-2.4.6-response-files.patch

@@ -8,14 +8,14 @@ lld (impersonating GNU ld) only supports response files, not
 linker scripts. Using a linker script as input just to pass a
 list of files is overkill for cases when a response file is enough.
 ---
- libtool-2.4.6/config/ltmain.m4sh | 28 ++++++++++++++--------------
+ libtool-2.4.6/build-aux/ltmain.in | 28 ++++++++++++++--------------
  libtool-2.4.6/m4/libtool.m4      |  2 ++
  2 files changed, 16 insertions(+), 14 deletions(-)
 
-diff --git libtool-2.4.6/build-aux/ltmain.sh.orig libtool-2.4.6/build-aux/ltmain.sh
+diff --git libtool-2.4.6/build-aux/ltmain.in.orig libtool-2.4.6/build-aux/ltmain.in
 index 2641327..f6b4217 100644
---- libtool-2.4.6/build-aux/ltmain.sh.orig	2019-05-14 15:41:21.977391100 +0200
-+++ libtool-2.4.6/build-aux/ltmain.sh	2019-05-14 15:43:07.767697900 +0200
+--- libtool-2.4.6/build-aux/ltmain.in.orig	2019-05-14 15:41:21.977391100 +0200
++++ libtool-2.4.6/build-aux/ltmain.in	2019-05-14 15:43:07.767697900 +0200
 @@ -9852,20 +9852,7 @@ EOF
  	  last_robj=
  	  k=1

extras/tools/libtool-2.4.6-san.patch

@@ -26,17 +26,3 @@ Copyright-paperwork-exempt: Yes
          func_quote_for_eval "$arg"
  	arg=$func_quote_for_eval_result
          func_append compile_command " $arg"
---- libtool-2.4.6/build-aux/ltmain.sh.orig	2019-03-06 17:25:38.610781500 +0100
-+++ libtool-2.4.6/build-aux/ltmain.sh	2019-03-06 17:26:53.790387700 +0100
-@@ -7273,9 +7273,10 @@
-       # --sysroot=*          for sysroot support
-       # -O*, -g*, -flto*, -fwhopr*, -fuse-linker-plugin GCC link-time optimization
-       # -stdlib=*            select c++ std lib with clang
-+      # -fsanitize=*         Clang/GCC memory and address sanitizer
-       -64|-mips[0-9]|-r[0-9][0-9]*|-xarch=*|-xtarget=*|+DA*|+DD*|-q*|-m*| \
-       -t[45]*|-txscale*|-p|-pg|--coverage|-fprofile-*|-F*|@*|-tp=*|--sysroot=*| \
--      -O*|-g*|-flto*|-fwhopr*|-fuse-linker-plugin|-fstack-protector*|-stdlib=*)
-+      -O*|-g*|-flto*|-fwhopr*|-fuse-linker-plugin|-fstack-protector*|-stdlib=*|-fsanitize=*)
-         func_quote_for_eval "$arg"
- 	arg=$func_quote_for_eval_result
-         func_append compile_command " $arg"