libc6-dbg: improve reproducibility

Prevent bison from generating #line comments containing build
host paths references.

[YOCTO #12625]

(From OE-Core rev: 85af760bb7370d001df0ab5915bc9ee7e6c03dfd)

Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/glibc/glibc/0030-plural_c_no_preprocessor_lines.patch

@@ -0,0 +1,21 @@
+Improve reproducibility:
+Do not put any #line preprocessor commands in bison generated files.
+These lines contain absolute paths containing file locations on
+the host build machine.
+
+Upstream-Status: Pending
+Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>
+
+diff --git a/intl/Makefile b/intl/Makefile
+index 2219717..a203780 100644
+--- a/intl/Makefile
++++ b/intl/Makefile
+@@ -151,7 +151,7 @@ $(objpfx)tst-gettext6.out: $(objpfx)tst-gettext.out
+ 
+ CPPFLAGS += -D'LOCALEDIR="$(localedir)"' \
+ 	    -D'LOCALE_ALIAS_PATH="$(localedir)"'
+-BISONFLAGS = --yacc --name-prefix=__gettext --output
++BISONFLAGS = --yacc --no-lines --name-prefix=__gettext --output
+ 
+ $(inst_localedir)/locale.alias: locale.alias $(+force)
+ 	$(do-install)

meta/recipes-core/glibc/glibc_2.27.bb

@@ -44,6 +44,7 @@ SRC_URI = "${GLIBC_GIT_URI};branch=${SRCBRANCH};name=glibc \
            file://0027-Acquire-ld.so-lock-before-switching-to-malloc_atfork.patch \
            file://0028-bits-siginfo-consts.h-enum-definition-for-TRAP_HWBKP.patch \
            file://0029-Replace-strncpy-with-memccpy-to-fix-Wstringop-trunca.patch \
+           file://0030-plural_c_no_preprocessor_lines.patch \
 "
 
 NATIVESDKFIXES ?= ""