contribs: don't force libraries to be build statically locally

The CMAKE variable already sets it for all targets.

contrib/src/glew/rules.mak

@@ -17,6 +17,6 @@ glew: glew-$(GLEW_VERSION).tgz .sum-glew
 	$(MOVE)
 
 .glew: glew toolchain.cmake
-	cd $</build/cmake && $(HOSTVARS_PIC) $(CMAKE) -DBUILD_SHARED_LIBS:BOOL=OFF -DGLEW_USE_STATIC_LIBS:BOOL=ON
+	cd $</build/cmake && $(HOSTVARS_PIC) $(CMAKE) -DGLEW_USE_STATIC_LIBS:BOOL=ON
 	+$(CMAKEBUILD) $</build/cmake --target install
 	touch $@

contrib/src/glslang/rules.mak

@@ -28,7 +28,7 @@ glslang: glslang-$(GLSLANG_VERSION).tar.gz .sum-glslang
 	$(MOVE)
 
 .glslang: glslang toolchain.cmake
-	cd $< && $(HOSTVARS_PIC) CXXFLAGS="-DYYDEBUG=0" $(CMAKE) -DBUILD_SHARED_LIBS=OFF \
+	cd $< && $(HOSTVARS_PIC) CXXFLAGS="-DYYDEBUG=0" $(CMAKE) \
 	    -DENABLE_GLSLANG_BINARIES=OFF
 	+$(CMAKEBUILD) $< --target install
 	touch $@

contrib/src/libebur128/rules.mak

@@ -20,6 +20,6 @@ libebur128: libebur128-$(LIBEBUR128_VERSION).tar.gz .sum-libebur128
 	$(MOVE)
 
 .libebur128: libebur128 toolchain.cmake
-	cd $< && $(HOSTVARS_PIC) $(CMAKE) -DENABLE_INTERNAL_QUEUE_H=TRUE -DBUILD_SHARED_LIBS=FALSE
+	cd $< && $(HOSTVARS_PIC) $(CMAKE) -DENABLE_INTERNAL_QUEUE_H=TRUE
 	+$(CMAKEBUILD) $< --target install
 	touch $@