package/clang: bump to 8.0.0

Clang no longer needs llvm-config. It now looks for LLVMConfig.cmake,
which is specified by LLVM_DIR option.

The license file hash changed due to a copyright year update:

-Copyright (c) 2007-2018 University of Illinois at Urbana-Champaign.
+Copyright (c) 2007-2019 University of Illinois at Urbana-Champaign.

Signed-off-by: Valentin Korenblit <valentinkorenblit@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/clang/clang.hash

@@ -1,3 +1,3 @@
 # locally calculated
-sha256 a45b62dde5d7d5fdcdfa876b0af92f164d434b06e9e89b5d0b1cbc65dfe3f418 cfe-7.0.1.src.tar.xz
-sha256 3f3f2e96e3b7319d2b4b49227d6da624a717340107ce2ca5342a25e0e57dfd35 LICENSE.TXT
+sha256 084c115aab0084e63b23eee8c233abb6739c399e29966eaeccfc6e088e0b736b cfe-8.0.0.src.tar.xz
+sha256 bdc41b826a9a50c7a31c1b613ca5d46415be68d5cc6da06f91f5bc1db8ad87aa LICENSE.TXT

package/clang/clang.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-CLANG_VERSION = 7.0.1
+CLANG_VERSION = 8.0.0
 CLANG_SITE = http://llvm.org/releases/$(CLANG_VERSION)
 CLANG_SOURCE = cfe-$(CLANG_VERSION).src.tar.xz
 CLANG_LICENSE = NCSA
@@ -49,9 +49,9 @@ CLANG_CONF_OPTS += \
 	-DCLANG_INCLUDE_DOCS=OFF \
 	-DCLANG_INCLUDE_TESTS=OFF
 
-HOST_CLANG_CONF_OPTS += -DLLVM_CONFIG:FILEPATH=$(HOST_DIR)/bin/llvm-config \
+HOST_CLANG_CONF_OPTS += -DLLVM_DIR=$(HOST_DIR)/lib/cmake/llvm \
 	-DCLANG_DEFAULT_LINKER=$(TARGET_LD)
-CLANG_CONF_OPTS += -DLLVM_CONFIG:FILEPATH=$(STAGING_DIR)/usr/bin/llvm-config \
+CLANG_CONF_OPTS += -DLLVM_DIR=$(STAGING_DIR)/usr/lib/cmake/llvm \
 	-DCLANG_TABLEGEN:FILEPATH=$(HOST_DIR)/bin/clang-tblgen \
 	-DLLVM_TABLEGEN_EXE:FILEPATH=$(HOST_DIR)/bin/llvm-tblgen