Makefile.am: Properly link examples with libvlc

This fixes the build with gcc 10

Makefile.am

@@ -30,7 +30,6 @@ if HAVE_EXAMPLES
 noinst_PROGRAMS = helloworld tests imem discovery
 
 AM_CPPFLAGS = $(vlc_CFLAGS) -Wextra -Wall
-AM_LDFLAGS = $(vlc_LIBS)
 
 if HAVE_WERROR
 # This is meant to make our builds fail if a deprecated method is present
@@ -38,8 +37,12 @@ AM_CPPFLAGS += -Werror
 endif
 
 helloworld_SOURCES = examples/helloworld/main.cpp
+helloworld_LDADD = $(vlc_LIBS)
 imem_SOURCES = examples/imem/imem.cpp
+imem_LDADD = $(vlc_LIBS)
 tests_SOURCES = test/main.cpp
+tests_LDADD = $(vlc_LIBS)
 discovery_SOURCES = examples/renderers/discovery.cpp
+discovery_LDADD = $(vlc_LIBS)
 
 endif