build: disable symbol table, DWARF generation for builds (burningalchemist#535)

disable symbol table, DWARF generation for builds

Author: burningalchemist

.promu.yml

@@ -14,6 +14,8 @@ build:
       -X github.com/prometheus/common/version.Branch={{.Branch}}
       -X github.com/prometheus/common/version.BuildUser={{user}}@{{host}}
       -X github.com/prometheus/common/version.BuildDate={{date "20060102-15:04:05"}}
+      -s
+      -w
 tarball:
     files:
       - LICENSE