Fix build docs script

Summary:
Fixed build-docs script. Workaround for #373
Closes #447

Differential Revision: D4479613

Pulled By: rnystrom

fbshipit-source-id: abc61ed11ae01efbbe9b5aaab2036501d269f9c7

build_docs.sh

@@ -5,6 +5,17 @@
 # ------------------------------
 SOURCE=Source
 SOURCE_TMP=IGListKit
+SOURCEDIR=Source/
+COMMONDIR=Source/Common/
+
+# store all the file names in Common folder
+COMMONFILES=($(find Source/Common -maxdepth 1 -type f -exec basename {} \;))
+
+# move files in Common folder to Source folder
+for f in "${COMMONFILES[@]}"
+do
+  mv $COMMONDIR$f $SOURCE
+done
 
 # temporary workaround when using SPM dir format
 # https://github.com/realm/jazzy/issues/667
@@ -26,3 +37,9 @@ jazzy \
 
 # restore the dir per the jazzy issue
 mv $SOURCE_TMP $SOURCE
+
+# move files back to Common folder
+for f in "${COMMONFILES[@]}"
+do
+  mv $SOURCEDIR$f $COMMONDIR
+done