Fix "No such file or directory" when $CC contains multiple words, such as when
ccache is used.
--- configure.orig	2013-06-26 06:01:23.000000000 -0500
+++ configure	2018-11-01 17:45:26.000000000 -0500
@@ -9906,13 +9906,13 @@
 # Set these flags *last*, or else the test programs won't compile
 if test x$GCC = xyes ; then
   # Using -ggdb3 makes (some versions of) Redhat's gcc-2.96 dump core
-  if "$CC" --version | grep '^2\.96$' 1>/dev/null 2>&1; then
+  if $CC --version | grep '^2\.96$' 1>/dev/null 2>&1; then
     true
   else
     CFLAGS="$CFLAGS -ggdb3"
   fi
   # FIXME: It would be better to actually test if this option works and/or is needed.
-  if "$CC" --version | grep 'gcc.* 4\.' 1>/dev/null 2>&1; then
+  if $CC --version | grep 'gcc.* 4\.' 1>/dev/null 2>&1; then
     CFLAGS="$CFLAGS -Wno-pointer-sign"
   fi
   CFLAGS="$CFLAGS -Wall -W \
--- src/argp/configure.orig	2013-06-15 09:04:59.000000000 -0500
+++ src/argp/configure	2018-11-01 17:45:26.000000000 -0500
@@ -5767,7 +5767,7 @@
 # Set these flags *last*, or else the test programs won't compile
 if test x$GCC = xyes ; then
   # Using -ggdb3 makes (some versions of) Redhat's gcc-2.96 dump core
-  if "$CC" --version | grep '^2\.96$' 1>/dev/null 2>&1; then
+  if $CC --version | grep '^2\.96$' 1>/dev/null 2>&1; then
     true
   else
     CFLAGS="$CFLAGS -ggdb3"
--- src/sftp/configure.orig	2013-06-26 06:01:54.000000000 -0500
+++ src/sftp/configure	2018-11-01 17:45:26.000000000 -0500
@@ -6252,7 +6252,7 @@
 # Set these flags *last*, or else the test programs won't compile
 if test x$GCC = xyes ; then
   # Using -ggdb3 makes (some versions of) Redhat's gcc-2.96 dump core
-  if "$CC" --version | grep '^2\.96$' 1>/dev/null 2>&1; then
+  if $CC --version | grep '^2\.96$' 1>/dev/null 2>&1; then
     true
   else
     CFLAGS="$CFLAGS -ggdb3"
--- src/spki/configure.orig	2013-06-15 09:05:11.000000000 -0500
+++ src/spki/configure	2018-11-01 17:45:26.000000000 -0500
@@ -5255,13 +5255,13 @@
 # Set these flags *last*, or else the test programs won't compile
 if test x$GCC = xyes ; then
   # Using -ggdb3 makes (some versions of) Redhat's gcc-2.96 dump core
-  if "$CC" --version | grep '^2\.96$' 1>/dev/null 2>&1; then
+  if $CC --version | grep '^2\.96$' 1>/dev/null 2>&1; then
     true
   else
     CFLAGS="$CFLAGS -ggdb3"
   fi
   # FIXME: It would be better to actually test if this option works and/or is needed.
-  if "$CC" --version | grep 'gcc.* 4\.' 1>/dev/null 2>&1; then
+  if $CC --version | grep 'gcc.* 4\.' 1>/dev/null 2>&1; then
     CFLAGS="$CFLAGS -Wno-pointer-sign"
   fi
   CFLAGS="$CFLAGS -Wall -W \