Undo the accidental config.h changes in the pcre 10.40 update.

Most importantly, the __attribute__((__uninitialized__)) #define, which
is important for performance.

Found post-submit by a 0.5s boot time regression. (There are lots of
regular expressions used in the SELinux stuff.)

Bug: http://b/229665357
Test: treehugger
Change-Id: Ie4760c3e959110bdad361aceff438d1f2bb8e5bb
(cherry picked from commit 699503cf925a8aa74d7521798629a392af5e7c7a)
Merged-In: Ie4760c3e959110bdad361aceff438d1f2bb8e5bb
diff --git a/src/config.h b/src/config.h
index b50a74c..83815a6 100644
--- a/src/config.h
+++ b/src/config.h
@@ -54,13 +54,13 @@
 /* #undef EBCDIC_NL25 */
 
 /* Define this if your compiler supports __attribute__((uninitialized)) */
-/* #undef HAVE_ATTRIBUTE_UNINITIALIZED */
+#define HAVE_ATTRIBUTE_UNINITIALIZED 1
 
 /* Define to 1 if you have the `bcopy' function. */
 #define HAVE_BCOPY 1
 
 /* Define to 1 if you have the <bzlib.h> header file. */
-#define HAVE_BZLIB_H 1
+/* #undef HAVE_BZLIB_H */
 
 /* Define to 1 if you have the <dirent.h> header file. */
 #define HAVE_DIRENT_H 1
@@ -111,7 +111,7 @@
 #define HAVE_REALPATH 1
 
 /* Define to 1 if you have the `secure_getenv' function. */
-#define HAVE_SECURE_GETENV 1
+/* #undef HAVE_SECURE_GETENV */
 
 /* Define to 1 if you have the <stdint.h> header file. */
 #define HAVE_STDINT_H 1