clang: add .git to repository source url

Align the source url with oe-core
(meta/recipes-devtools/llvm/llvm_git.bb)

Currently when creating shallow tarball download mirror
one of the biggest files is llvm and it has to be stored twice
because of this difference.

Signed-off-by: Peter Marko <peter.marko@siemens.com>

recipes-devtools/clang/common.inc

@@ -5,7 +5,7 @@ LIC_FILES_CHKSUM = "file://llvm/LICENSE.TXT;md5=${LLVMMD5SUM} \
 "
 LICENSE = "Apache-2.0-with-LLVM-exception"
 
-BASEURI ??= "${LLVM_GIT}/llvm-project;protocol=${LLVM_GIT_PROTOCOL};branch=${BRANCH}"
+BASEURI ??= "${LLVM_GIT}/llvm-project.git;protocol=${LLVM_GIT_PROTOCOL};branch=${BRANCH}"
 SRC_URI = "\
     ${BASEURI} \
     file://llvm-config \