st/clover: Add libelf cflags to the build

Otherwise the build will fail, when the library is in a non default
location.

v2 [Emil Velikov]
 - drop the unneeded cflags from targets/opencl.

Cc: "11.1 11.2" <mesa-stable@lists.freedesktop.org>
Fixes: 7f585a6a98 "configure.ac: use pkg-config for libelf"
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=93524
Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
(cherry picked from commit 04bc09fdf9)

src/gallium/state_trackers/clover/Makefile.am

@@ -41,6 +41,7 @@ libclllvm_la_CXXFLAGS = \
 	$(VISIBILITY_CXXFLAGS) \
 	$(LLVM_CXXFLAGS) \
 	$(DEFINES) \
+	$(LIBELF_CFLAGS) \
 	-DLIBCLC_INCLUDEDIR=\"$(LIBCLC_INCLUDEDIR)/\" \
 	-DLIBCLC_LIBEXECDIR=\"$(LIBCLC_LIBEXECDIR)/\" \
 	-DCLANG_RESOURCE_DIR=\"$(CLANG_RESOURCE_DIR)\"

src/gallium/targets/opencl/Makefile.am

@@ -2,9 +2,6 @@ include $(top_srcdir)/src/gallium/Automake.inc
 
 lib_LTLIBRARIES = lib@OPENCL_LIBNAME@.la
 
-AM_CPPFLAGS = \
-        $(LIBELF_CFLAGS)
-
 lib@OPENCL_LIBNAME@_la_LDFLAGS = \
 	$(LLVM_LDFLAGS) \
 	-no-undefined \