[PATCH 1/2] gdbsupport: Resolve shellcheck issues in create-version.sh script

[Andrew Burgess <andrew.burgess@embecosm.com>]

Run shellcheck (version 0.4.7) on the create-version.sh script, and
resolve the issues it highlighter - they all seemed reasonable.

gdbsupport/ChangeLog:

	* create-version.sh: Resolve issues highlighted by shellcheck.
---
 gdbsupport/ChangeLog         |  4 ++++
 gdbsupport/create-version.sh | 18 ++++++++++--------
 2 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/gdbsupport/create-version.sh b/gdbsupport/create-version.sh
index 81d6dbf8c1f..6135d219d94 100755
--- a/gdbsupport/create-version.sh
+++ b/gdbsupport/create-version.sh
@@ -27,12 +27,14 @@ host_alias="$2"
 target_alias="$3"
 output="$4"
 
-rm -f version.c-tmp $output version.tmp
-date=`sed -n -e 's/^.* BFD_VERSION_DATE \(.*\)$/\1/p' $srcdir/../bfd/version.h`
-sed -e "s/DATE/$date/" < $srcdir/version.in > version.tmp
-echo '#include "gdbsupport/version.h"' >> version.c-tmp
-echo 'const char version[] = "'"`sed q version.tmp`"'";' >> version.c-tmp
-echo 'const char host_name[] = "'"$host_alias"'";' >> version.c-tmp
-echo 'const char target_name[] = "'"$target_alias"'";' >> version.c-tmp
-mv version.c-tmp $output
+rm -f version.c-tmp "$output" version.tmp
+date=$(sed -n -e 's/^.* BFD_VERSION_DATE \(.*\)$/\1/p' "$srcdir/../bfd/version.h")
+sed -e "s/DATE/$date/" < "$srcdir/version.in" > version.tmp
+{
+    echo '#include "gdbsupport/version.h"'
+    echo 'const char version[] = "'"$(sed q version.tmp)"'";'
+    echo 'const char host_name[] = "'"$host_alias"'";'
+    echo 'const char target_name[] = "'"$target_alias"'";'
+} >> version.c-tmp
+mv version.c-tmp "$output"
 rm -f version.tmp
-- 
2.14.5