get rid of cmake warning

cmake/build_configurations/mysql_release.cmake

@@ -136,7 +136,7 @@ IF(UNIX)
           RedHat/Fedora/Oracle Linux: yum install libaio-devel
           SuSE:                       zypper install libaio-devel
 
-        If you really do not want it, pass -DIGNORE_AIO_CHECK to cmake.
+          If you really do not want it, pass -DIGNORE_AIO_CHECK=ON to cmake.
         ")
       ENDIF()
 

storage/tokudb/PerconaFT/cmake_modules/TokuFeatureDetection.cmake

@@ -134,4 +134,4 @@ static __thread int tlsvar = 0;
 int main(void) { return tlsvar; }" HAVE_GNU_TLS)
 
 ## set TOKUDB_REVISION
-set(CMAKE_TOKUDB_REVISION 0 CACHE INTEGER "Revision of tokudb.")
+set(CMAKE_TOKUDB_REVISION 0 CACHE STRING "Revision of tokudb.")