UPSTREAM: Makefile: Remove # characters from compiler string

When using AMD's Optimizing C/C++ Compiler (AOCC), the build fails due
to a # character in the version string, which is interpreted as a
comment:

$ make CC=clang defconfig init/main.o
include/config/auto.conf.cmd:1374: *** invalid syntax in conditional. Stop.

$ sed -n 1374p include/config/auto.conf.cmd
ifneq "$(CC_VERSION_TEXT)" "AMD clang version 11.0.0 (CLANG: AOCC_2.3.0-Build#85 2020_11_10) (based on LLVM Mirror.Version.11.0.0)"

Remove all # characters in the version string so that the build does not
fail unexpectedly.

Link: ClangBuiltLinux/linux#1298
Reported-by: Michael Fuckner <michael@fuckner.net>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Change-Id: Ide6ece705358ef398edca89aeb1cce388b5284f9
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
(cherry picked from commit c75173a)
Bug: 209655537
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
(cherry picked from commit f463f48)
Signed-off-by: TogoFire <togofire@mailfence.com>

Makefile

@@ -589,7 +589,7 @@ endif
 # Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
 # CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
 # and from include/config/auto.conf.cmd to detect the compiler upgrade.
-CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1)
+CC_VERSION_TEXT = $(shell $(CC) --version 2>/dev/null | head -n 1 | sed 's/\#//g')
 
 ifneq ($(findstring clang,$(CC_VERSION_TEXT)),)
 ifneq ($(CROSS_COMPILE),)