Update the apache source in the travis config

It seems to be responsible for many test failures

Author: travitch

.travis/apache_clang.sh

@@ -7,9 +7,9 @@ export PATH=/usr/lib/llvm-3.4/bin:${WLLVM_HOME}:${PATH}
 export LLVM_COMPILER=clang
 export WLLVM_OUTPUT=WARNING
 
-APACHE_VER=2.4.17
+APACHE_VER=2.4.18
+wget https://archive.apache.org/dist/httpd/httpd-${APACHE_VER}.tar.gz
 
-wget http://apache.mirrors.pair.com//httpd/httpd-${APACHE_VER}.tar.gz
 tar xfz httpd-${APACHE_VER}.tar.gz
 mv httpd-${APACHE_VER} apache_clang
 cd apache_clang

.travis/apache_dragonegg.sh

@@ -11,9 +11,10 @@ export LLVM_DRAGONEGG_PLUGIN=/usr/lib/gcc/x86_64-linux-gnu/4.6/plugin/dragonegg.
 
 export WLLVM_OUTPUT=WARNING
 
-APACHE_VER=2.4.17
 
-wget http://apache.mirrors.pair.com//httpd/httpd-${APACHE_VER}.tar.gz
+APACHE_VER=2.4.18
+wget https://archive.apache.org/dist/httpd/httpd-${APACHE_VER}.tar.gz
+
 tar xfz httpd-${APACHE_VER}.tar.gz
 mv httpd-${APACHE_VER} apache_dragonegg
 cd apache_dragonegg