buildtools: fix build with busybox

If using busybox for mktemp and awk (as in Alpine),
some bugs prevent the script from running:

1/ It seems busybox mktemp requires the pattern to have at least
6 X and no other suffix.
The same has been fixed for other scripts in the past:
commit 3771edc354 ("buildtools: fix build for some mktemp")

2/ It seems busybox awk does not accept the regex ^.*{
except if the opening curly brace is escaped.

Fixes: 4c82473412 ("build: add internal tag check")
Fixes: 68b1f1cda5 ("build: check AVX512 rather than binutils version")
Fixes: 3290ac14eb ("buildtools: detect discrepancies for experimental symbols")
Cc: stable@dpdk.org

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Acked-by: David Marchand <david.marchand@redhat.com>

buildtools/binutils-avx512-check.sh

@@ -3,7 +3,7 @@
 # Copyright(c) 2020 Intel Corporation
 
 AS=${AS:-as}
-OBJFILE=$(mktemp -t dpdk.binutils-check.XXXXXX.o)
+OBJFILE=$(mktemp -t dpdk.binutils-check.XXXXXX)
 trap 'rm -f "$OBJFILE"' EXIT
 # from https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90028
 GATHER_PARAMS='0x8(,%ymm1,1),%ymm0{%k2}'

buildtools/check-symbols.sh

@@ -18,7 +18,7 @@ then
 	exit 0
 fi
 
-DUMPFILE=$(mktemp -t dpdk.${0##*/}.XXX.objdump)
+DUMPFILE=$(mktemp -t dpdk.${0##*/}.objdump.XXXXXX)
 trap 'rm -f "$DUMPFILE"' EXIT
 objdump -t $OBJFILE >$DUMPFILE
 

buildtools/map-list-symbol.sh

@@ -44,7 +44,7 @@ for file in $@; do
 			ret = 1;
 		}
 	}
-	/^.*{/ {
+	/^.*\{/ {
 		if ("'$section'" == "all" || $1 == "'$section'") {
 			current_section = $1;
 		}