Added FindlibYajl.cmake script

cmake/Modules/FindlibYajl.cmake

+#######################################################################################################################
+#
+# cmake module for finding the yajl library
+#
+# returns:
+#   libYajl_FOUND       : true or false, depending on whether the package was found
+#   libYajl_LIBRARY     : path to the library
+# @author Patrick Nonn, DESY
+#
+#######################################################################################################################
+
+#######################################################################################################################
+#
+# IMPORTANT NOTE:
+#
+# DO NOT MODIFY THIS FILE inside a project. Instead update the project-template repository and pull the change from
+# there. Make sure to keep the file generic, since it will be used by other projects, too.
+#
+# If you have modified this file inside a project despite this warning, make sure to cherry-pick all your changes
+# into the project-template repository immediately.
+#
+#######################################################################################################################
+
+set(libYajl_FOUND 0)
+
+find_library(libYajl_LIBRARY
+    NAMES yajl yajl.so libyajl.so
+    PATHS /usr/lib /usr/lib32 /usr/lib64 /usr/local/lib
+    HINTS ${CMAKE_INSTALL_LIBDIR}
+)
+
+# use a macro provided by CMake to check if all the listed arguments are valid and set Yajl_FOUND accordingly
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(libYajl REQUIRED_VARS libYajl_LIBRARY)