fix some version numbers in the compile examples

compile_examples.txt

@@ -12,11 +12,11 @@ CXX=clang++-3.6 CC=clang-3.6 CPPFLAGS="-I/usr/include/c++/4.8/ -I/usr/include/x8
 
 ## On FreeBSD
 
-## compile using gcc 4.9
-CC=gcc49 CXX=g++49 LIBS="-Wl,-rpath=/usr/local/lib/gcc49 -liconv" CPPFLAGS=-D_GLIBCXX_USE_C99 gmake
+## compile using gcc 4.8
+CC=gcc49 CXX=g++49 LIBS="-Wl,-rpath=/usr/local/lib/gcc48 -liconv" CPPFLAGS=-D_GLIBCXX_USE_C99 gmake
 
 ## compile using gcc 4.9
-CC=gcc48 CXX=g++48 LIBS="-Wl,-rpath=/usr/local/lib/gcc48 -liconv" CPPFLAGS=-D_GLIBCXX_USE_C99 gmake
+CC=gcc48 CXX=g++48 LIBS="-Wl,-rpath=/usr/local/lib/gcc49 -liconv" CPPFLAGS=-D_GLIBCXX_USE_C99 gmake
 
 ## compile using clang 3.7
 CC=clang37 CXX=clang++37 gmake