Fix bug GH-15514 (Configure error: genif.sh: syntax error)

Autoconf assigns the current suitable shell to SHELL variable. This
notably fixes cases on Solaris 10 when using C shell or KornShell where
genif.sh: syntax error at line 35 occurs due to using the `sh` command.

Author: petk

NEWS

@@ -6,6 +6,7 @@ PHP                                                                        NEWS
   . Fixed bug GH-15408 (MSan false-positve on zend_max_execution_timer).
     (zeriyoshi)
   . Fixed bug GH-15515 (Configure error grep illegal option q). (Peter Kokot)
+  . Fixed bug GH-15514 (Configure error: genif.sh: syntax error). (Peter Kokot)
 
 - MySQLnd:
   . Fixed bug GH-15432 (Heap corruption when querying a vector). (cmb,

configure.ac

@@ -1792,10 +1792,10 @@ FEO
 dnl Run this only when generating all the files.
 if test -n "\$REDO_ALL"; then
   echo "creating main/internal_functions.c"
-  AWK="$AWK" sh $srcdir/build/genif.sh $srcdir/main/internal_functions.c.in "$EXT_STATIC" > main/internal_functions.c
+  AWK="$AWK" $SHELL $srcdir/build/genif.sh $srcdir/main/internal_functions.c.in "$EXT_STATIC" > main/internal_functions.c
 
   echo "creating main/internal_functions_cli.c"
-  AWK="$AWK" sh $srcdir/build/genif.sh $srcdir/main/internal_functions.c.in "$EXT_CLI_STATIC" > main/internal_functions_cli.c
+  AWK="$AWK" $SHELL $srcdir/build/genif.sh $srcdir/main/internal_functions.c.in "$EXT_CLI_STATIC" > main/internal_functions_cli.c
 
     if test "$PHP_SAPI" = "apache2handler"; then
       if test "$APACHE_VERSION" -ge 2004001; then