vdso: Build without debug info

The debug info is not very useful and embeds build paths because
elf-vdso.so.o is built without CFLAGS, breaking reproducibility of
elf-vdso.so.o and thus the kernel.  Just stop passing debug flags to
amd64_vdso.sh.

Reviewed by:	kib
MFC after:	2 weeks
Sponsored by:	Klara, Inc.
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D52129

Author: markjdb

sys/conf/files.amd64

@@ -13,14 +13,14 @@ include 	"conf/files.x86"
 #
 elf-vdso.so.o			standard				\
 	dependency	"$S/amd64/amd64/sigtramp.S assym.inc $S/conf/vdso_amd64.ldscript $S/tools/amd64_vdso.sh" \
-	compile-with	"env AWK='${AWK}' NM='${NM}' LD='${LD}' CC='${CC}' DEBUG='${DEBUG}' OBJCOPY='${OBJCOPY}' ELFDUMP='${ELFDUMP}' S='${S}' sh $S/tools/amd64_vdso.sh" \
+	compile-with	"env AWK='${AWK}' NM='${NM}' LD='${LD}' CC='${CC}' OBJCOPY='${OBJCOPY}' ELFDUMP='${ELFDUMP}' S='${S}' sh $S/tools/amd64_vdso.sh" \
 	no-ctfconvert	\
 	no-implicit-rule before-depend	\
 	clean		"elf-vdso.so.o elf-vdso.so.1 vdso_offsets.h sigtramp.pico"
 #
 elf-vdso32.so.o			optional	compat_freebsd32		\
 	dependency	"$S/amd64/ia32/ia32_sigtramp.S ia32_assym.h $S/conf/vdso_amd64_ia32.ldscript $S/tools/amd64_ia32_vdso.sh" \
-	compile-with	"env AWK='${AWK}' NM='${NM}' LD='${LD}' CC='${CC}' DEBUG='${DEBUG}' OBJCOPY='${OBJCOPY}' ELFDUMP='${ELFDUMP}' S='${S}' sh $S/tools/amd64_ia32_vdso.sh" \
+	compile-with	"env AWK='${AWK}' NM='${NM}' LD='${LD}' CC='${CC}' OBJCOPY='${OBJCOPY}' ELFDUMP='${ELFDUMP}' S='${S}' sh $S/tools/amd64_ia32_vdso.sh" \
 	no-ctfconvert	\
 	no-implicit-rule before-depend	\
 	clean		"elf-vdso32.so.o elf-vdso32.so.1 vdso_ia32_offsets.h ia32_sigtramp.pico"

sys/tools/amd64_ia32_vdso.sh

@@ -58,7 +58,7 @@ then
     exit 1
 fi
 
-${CC} ${DEBUG} -x assembler-with-cpp -DLOCORE -fPIC -nostdinc -c \
+${CC} -x assembler-with-cpp -DLOCORE -fPIC -nostdinc -c \
    -o elf-vdso32.so.o -I. -I"${S}" -include opt_global.h \
    -DVDSO_NAME=elf_vdso32_so_1 -DVDSO_FILE=\"elf-vdso32.so.1\" \
    "${S}"/tools/vdso_wrap.S

sys/tools/amd64_vdso.sh

@@ -67,7 +67,7 @@ then
     exit 1
 fi
 
-${CC} ${DEBUG} -x assembler-with-cpp -DLOCORE -fPIC -nostdinc -c \
+${CC} -x assembler-with-cpp -DLOCORE -fPIC -nostdinc -c \
    -o elf-vdso.so.o -I. -I"${S}" -include opt_global.h \
    -DVDSO_NAME=elf_vdso_so_1 -DVDSO_FILE=\"elf-vdso.so.1\" \
    "${S}"/tools/vdso_wrap.S