src/CMakeLists.txt: Correct a typo.

extras/buildsystem/cmake/CMakeLists/src_CMakeLists.txt

@@ -177,7 +177,7 @@ target_link_libraries(libvlc ${CARBON_FRAMEWORK})
 # version.c
 
 add_custom_command(
-OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/foo.c
+OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/revision.c
 COMMAND sh "rm -f misc/revision.c misc/revision.c.tmp &&
     echo '/* AUTOGENERATED FILE - DO NOT EDIT */' > misc/revision.c.tmp &&
     REVISION=\"$$\(LANG=C svnversion \\\"$\(top_srcdir)\\\" 2>/dev/null || echo exported)\" ; &&