Fix the usage of the _GNU_SOURCE and _BSD_SOURCE macros in the main

internal header file, sqliteInt.h.  Set HAVE_STRCHRNUL to 1 by default on
Linux only.

FossilOrigin-Name: 59e2c9df02d7e988c5ad44c560ead1e5288b12e7

diff --cc manifest
index fd932fa1b7a25e2f0c445603216f8909f0ac49ae,aa9b7846e6785f87b57d63be3e5966e6222e48d0..34532191e943d4480950790777485f630be85402
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Simplify\stwo\sconditionals\sand\sadd\stestcase()\smacros\sto\sthe\saffinity\stransform\nlogic\sin\sthe\scomparison\soperators.
- D 2014-09-19T22:44:20.033
 -C Only\senable\sHAVE_STRCHRNUL\sby\sdefault\son\slinux,\sas\sthat\sis\sthe\sonly\splace\nit\sappears\sto\swork\sby\sdefault.
 -D 2014-09-20T00:29:20.392
++C Fix\sthe\susage\sof\sthe\s_GNU_SOURCE\sand\s_BSD_SOURCE\smacros\sin\sthe\smain\ninternal\sheader\sfile,\ssqliteInt.h.\s\sSet\sHAVE_STRCHRNUL\sto\s1\sby\sdefault\son\nLinux\sonly.
++D 2014-09-20T00:35:05.099
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in cf57f673d77606ab0f2d9627ca52a9ba1464146a
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1198,7 -1198,7 +1198,8 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P 3b21cf2b284048da4b728a5d6ec89e5c330144d4
- R c321e5b6443015b26d22f3eade4b771c
 -P 35db3e2f350ca2bc6bb9e1a647aec7f93bfb7065
++P 544664cadfb4e504bc0b321c865d1ecb8a831e20 0fac2c045f47c7735af4eb68ced81d8b43622a1f
+ R 8acbfeff4e0806bab5948d89d293bcf4
++T +closed 0fac2c045f47c7735af4eb68ced81d8b43622a1f
  U drh
- Z b0d83e95571a3002a17dc014110d23f5
 -Z 6fc488f20a05aa47a5cf4ff95476cc98
++Z 03e6ed8cf11426837aa81912fc8917d5

diff --cc manifest.uuid
index aee58dcbcbe1ab0996a4d5a61c52a5881cd2ae58,da30674aba046ed8d8e1d98288491c31df114a7e..299d8934f2455d564efdaef6c1984a08a778d3e9
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 544664cadfb4e504bc0b321c865d1ecb8a831e20
 -0fac2c045f47c7735af4eb68ced81d8b43622a1f
++59e2c9df02d7e988c5ad44c560ead1e5288b12e7