cmake HAVE_MYSQL_H examples

mysql/mysql-proxy CMakeLists.txt :198 

CHECK_INCLUDE_FILES(mysql.h      HAVE_MYSQL_H)

session-replay-tools/cetus CMakeLists.txt :164 

CHECK_INCLUDE_FILES(mysql.h      HAVE_MYSQL_H)

JulNadeauCA/libagar CMakeChecks.cmake :1934 

CHECK_INCLUDE_FILE(mysql.h HAVE_MYSQL_H)