UBUNTU: [Packaging] Use consistent llvm/clang for rust

rust-1.62 and bindgen-0.56 were build against llvm-14, continue to use
the same llvm at runtime. As bindgen-0.56 has not yet been fixed to
use clang-16 at runtime.

Signed-off-by: Dimitri John Ledkov <dimitri.ledkov@canonical.com>
[ we do not use rust-1.62 anymore, but we still use bindgen-0.56 ]
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>

debian.master/control.stub.in

@@ -43,8 +43,6 @@ Build-Depends:
  rust-src [amd64],
  rustfmt [amd64],
  bindgen-0.56 [amd64],
- llvm-15 [amd64],
- clang-15 [amd64],
  libstdc++-dev,
 Build-Depends-Indep:
  xmlto <!stage1>,

debian/rules.d/0-common-vars.mk

@@ -238,7 +238,7 @@ kmake = make ARCH=$(build_arch) \
 	CROSS_COMPILE=$(CROSS_COMPILE) \
 	HOSTCC=$(HOSTCC) \
 	CC=$(CROSS_COMPILE)$(gcc) \
-	BINDGEN=bindgen-0.56 \
+	BINDGEN=bindgen-0.56 CLANG_PATH=clang-14 LIBCLANG_PATH=/usr/lib/llvm-14/lib \
 	KERNELVERSION=$(abi_release)-$(target_flavour) \
 	CONFIG_DEBUG_SECTION_MISMATCH=y \
 	KBUILD_BUILD_VERSION="$(uploadnum)" \