package/llvm: disable libxml2

libxml2 is needed during Windows builds to populate the COFF
file manifest info.  This isn't required for Linux builds.

Cc: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Matthew Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/llvm/llvm.mk

@@ -133,6 +133,11 @@ HOST_LLVM_CONF_OPTS += -DLLVM_ENABLE_ZLIB=ON
 HOST_LLVM_DEPENDENCIES += host-zlib
 LLVM_CONF_OPTS += -DLLVM_ENABLE_ZLIB=OFF
 
+# libxml2 can be disabled as it is used for LLVM Windows builds where COFF
+# files include manifest info
+HOST_LLVM_CONF_OPTS += -DLLVM_ENABLE_LIBXML2=OFF
+LLVM_CONF_OPTS += -DLLVM_ENABLE_LIBXML2=OFF
+
 # We don't use llvm for static only build, so enable PIC
 HOST_LLVM_CONF_OPTS += -DLLVM_ENABLE_PIC=ON
 LLVM_CONF_OPTS += -DLLVM_ENABLE_PIC=ON