Avoid exit in trap as it breaks with some shells

Don't call exit in the trap handler as it causes the return code to be
zero with some buggy shells (dash and pdksh at least) and is useless
here anyway.
Signed-off-by: NLoïc Minier <loic.minier@linaro.org>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

configure

@@ -15,7 +15,9 @@ TMPC="${TMPDIR1}/qemu-conf-${RANDOM}-$$-${RANDOM}.c"
 TMPO="${TMPDIR1}/qemu-conf-${RANDOM}-$$-${RANDOM}.o"
 TMPE="${TMPDIR1}/qemu-conf-${RANDOM}-$$-${RANDOM}.exe"
 
-trap "rm -f $TMPC $TMPO $TMPE ; exit" EXIT INT QUIT TERM
+# NB: do not call "exit" in the trap handler; this is buggy with some shells;
+# see <1285349658-3122-1-git-send-email-loic.minier@linaro.org>
+trap "rm -f $TMPC $TMPO $TMPE" EXIT INT QUIT TERM
 
 compile_object() {
   $cc $QEMU_CFLAGS -c -o $TMPO $TMPC > /dev/null 2> /dev/null