move test main into test library to avoid redundant recompiling and hopefully speed up the testing a bit

.travis.yml

@@ -15,8 +15,9 @@ install:
    - echo -n ":" >>~/user-config.jam
    - echo " 2.7 ;" >>~/user-config.jam
    - ccache --show-stats
-   - which $CC
-   - ls -la `which $CC`
+   - ccache -V
+   - which $CXX
+   - ls -la `which $CXX`
 
 cache:
    directories:

test/Jamfile

@@ -50,6 +50,7 @@ rule link_libtorrent ( properties * )
 
 lib libtorrent_test
 	: # sources
+	main.cpp
 	test.cpp
 	setup_transfer.cpp
 	dht_server.cpp
@@ -83,7 +84,6 @@ lib advapi32 : : <name>Advapi32 ;
 
 project
 	: requirements
-	<source>main.cpp
 	<conditional>@link_test
 	<conditional>@link_libtorrent
 	: default-build