package/spirv-llvm-translator: use host-spirv-headers

We recently discovered that host-spirv-llvm-translator downloads the
SPIR-V headers during its build process, which is bad. Now that we
have a host variant of spirv-headers, we use it to avoid the
"downloading during the build".

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/spirv-llvm-translator/spirv-llvm-translator.mk

@@ -10,11 +10,13 @@ SPIRV_LLVM_TRANSLATOR_VERSION = v15.0.0-46-ge82ecc2bd7295604fcf1824e47c95fa6a09c
 SPIRV_LLVM_TRANSLATOR_SITE = $(call github,KhronosGroup,SPIRV-LLVM-Translator,$(SPIRV_LLVM_TRANSLATOR_VERSION))
 SPIRV_LLVM_TRANSLATOR_LICENSE = NCSA
 SPIRV_LLVM_TRANSLATOR_LICENSE_FILES = LICENSE.TXT
-HOST_SPIRV_LLVM_TRANSLATOR_DEPENDENCIES = host-clang host-llvm
+HOST_SPIRV_LLVM_TRANSLATOR_DEPENDENCIES = host-clang host-llvm host-spirv-headers
 HOST_SPIRV_LLVM_TRANSLATOR_CONF_OPTS = \
 	-DLLVM_BUILD_TOOLS=ON \
 	-DLLVM_DIR=$(HOST_DIR)/lib/cmake/llvm \
 	-DLLVM_SPIRV_BUILD_EXTERNAL=YES \
-	-DLLVM_SPIRV_INCLUDE_TESTS=OFF
+	-DLLVM_SPIRV_INCLUDE_TESTS=OFF \
+	-DLLVM_EXTERNAL_PROJECTS="SPIRV-Headers" \
+	-DLLVM_EXTERNAL_SPIRV_HEADERS_SOURCE_DIR=$(HOST_DIR)/include
 
 $(eval $(host-cmake-package))