Update cgo usage (#2184)

Author: StephenButtolph

scripts/constants.sh

@@ -32,7 +32,7 @@ fi
 #
 # We use "export" here instead of just setting a bash variable because we need
 # to pass this flag to all child processes spawned by the shell.
-export CGO_CFLAGS="-O -D__BLST_PORTABLE__"
+export CGO_CFLAGS="-O2 -D__BLST_PORTABLE__"
 # While CGO_ENABLED doesn't need to be explicitly set, it produces a much more
 # clear error due to the default value change in go1.20.
 export CGO_ENABLED=1

scripts/mock.gen.sh

@@ -21,6 +21,8 @@ then
   go install -v github.com/palantir/go-license@v1.25.0
 fi
 
+source ./scripts/constants.sh
+
 # tuples of (source interface import path, comma-separated interface names, output file path)
 input="scripts/mocks.mockgen.txt"
 while IFS= read -r line