Fixes error when using -P flag with generator

This patch fixes an error when using the -P flag with the generator to
set the CAPI manager's log level. The getopts string was missing a :
character after the P, and so the shell was saying OPTARG was an unbound
variable since the -P flag didn't pick up its value.

Author: akutz

examples/generate.sh

@@ -62,7 +62,7 @@ FLAGS
 EOF
 }
 
-while getopts ':b:B:c:dfhi:m:M:r:o:p:P' opt; do
+while getopts ':b:B:c:dfhi:m:M:r:o:p:P:' opt; do
   case "${opt}" in
   b)
     CABPK_MANAGER_IMAGE="${OPTARG}"