Update Gemfile to use linecache19 if running on Ruby 1.9

Gemfile

@@ -2,7 +2,8 @@ source "http://rubygems.org"
 gem "shoulda"
 gem "mocha"
 gem "rake"
-gem "ruby-debug"
+gem "ruby-debug", :platform => :ruby_18
+gem "ruby-debug19", :platform => :ruby_19
 gem "aws-s3", :require => "aws/s3"
 gem "sqlite3-ruby", "~>1.3.0"
 gem "appraisal"

Gemfile.lock

@@ -4,6 +4,7 @@ GEM
     appraisal (0.1)
       bundler
       rake
+    archive-tar-minitar (0.5.2)
     aws-s3 (0.6.2)
       builder
       mime-types
@@ -24,6 +25,8 @@ GEM
     formatador (0.0.16)
     json (1.5.1)
     linecache (0.43)
+    linecache19 (0.5.12)
+      ruby_core_source (>= 0.1.4)
     mime-types (1.16)
     mocha (0.9.9)
       rake
@@ -35,7 +38,17 @@ GEM
       ruby-debug-base (~> 0.10.4.0)
     ruby-debug-base (0.10.4)
       linecache (>= 0.3)
+    ruby-debug-base19 (0.11.25)
+      columnize (>= 0.3.1)
+      linecache19 (>= 0.5.11)
+      ruby_core_source (>= 0.1.4)
+    ruby-debug19 (0.11.6)
+      columnize (>= 0.3.1)
+      linecache19 (>= 0.5.11)
+      ruby-debug-base19 (>= 0.11.19)
     ruby-hmac (0.4.0)
+    ruby_core_source (0.1.5)
+      archive-tar-minitar (>= 0.5.2)
     shoulda (2.11.3)
     sqlite3-ruby (1.3.2)
     xml-simple (1.0.12)
@@ -52,5 +65,6 @@ DEPENDENCIES
   mocha
   rake
   ruby-debug
+  ruby-debug19
   shoulda
   sqlite3-ruby (~> 1.3.0)