main: more specific default values for GitVersion etc

Now looks like this:

  $ ./gocryptfs -version
  gocryptfs [GitVersion not set - please compile using ./build.bash]; go-fuse [GitVersionFuse not set - please compile using ./build.bash]; 0000-00-00 go1.8

Hopefully easier to grep for.

1 files changed, 2 insertions, 4 deletions

diff --git a/main.go b/main.go
index 2a7d435..160829f 100644
--- a/main.go
+++ b/main.go
@@ -28,13 +28,11 @@ const (
 	ErrExitMountPoint = 10
 )
 
-const pleaseBuildBash = "[not set - please compile using ./build.bash]"
-
 // GitVersion is the gocryptfs version according to git, set by build.bash
-var GitVersion = pleaseBuildBash
+var GitVersion = "[GitVersion not set - please compile using ./build.bash]"
 
 // GitVersionFuse is the go-fuse library version, set by build.bash
-var GitVersionFuse = pleaseBuildBash
+var GitVersionFuse = "[GitVersionFuse not set - please compile using ./build.bash]"
 
 // BuildTime is the Unix timestamp, set by build.bash
 var BuildTime = "0"