targets/opencl: hide all the exported llvm/clang mayhem... hopefully

Both llvm and clang polute the exported symbol table, as soon
as we try to link with either one. Other than those two
everything else looks good (clean).

Cc: Tom Stellard <thomas.stellard@amd.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>

src/gallium/targets/opencl/Makefile.am

@@ -6,6 +6,7 @@ lib@OPENCL_LIBNAME@_la_LDFLAGS = \
 	$(LLVM_LDFLAGS) \
 	-no-undefined \
 	-version-number 1:0 \
+	-Wl,--version-script=$(top_srcdir)/src/gallium/targets/opencl/opencl.sym \
 	$(GC_SECTIONS) \
 	$(LD_NO_UNDEFINED)
 

src/gallium/targets/opencl/opencl.sym

@@ -0,0 +1,6 @@
+{
+	global:
+		cl*;
+	local:
+		*;
+};