Prevent errors in runtests.sh when assert.sh and fs.sh are not found
Prevent errors in runtests.sh when assert.sh and fs.sh are not found

Summary: I've changed runtests.sh to be more lenient when assert.sh and fs.sh are missing.

Reviewed By: mroch

Differential Revision: D7372078

fbshipit-source-id: 8cbacc7bad26ddd77d3b04d8b3b7bc58abcb5eac

mroch/flow,mroch/flow,claudiopro/flow,facebook/flow,popham/flow,JonathanUsername/flow,facebook/flow,jamesgpearce/flow,jamesgpearce/flow,JonathanUsername/flow,facebook/flow,gabelevi/flow,AgentME/flow,nmote/flow,jamesgpearce/flow,samwgoldman/flow,nmote/flow,popham/flow,samwgoldman/flow,jamesgpearce/flow,popham/flow,mroch/flow,JonathanUsername/flow,facebook/flow,popham/flow,nmote/flow,AgentME/flow,nmote/flow,samwgoldman/flow,samwgoldman/flow,claudiopro/flow,JonathanUsername/flow,AgentME/flow,mroch/flow,gabelevi/flow,gabelevi/flow,JonathanUsername/flow,JonathanUsername/flow,facebook/flow,mroch/flow,JonathanUsername/flow,gabelevi/flow,popham/flow,mroch/flow,nmote/flow,mroch/flow,jamesgpearce/flow,gabelevi/flow,jamesgpearce/flow,nmote/flow,popham/flow,claudiopro/flow,facebook/flow,facebook/flow,samwgoldman/flow,gabelevi/flow,gabelevi/flow,AgentME/flow,samwgoldman/flow,jamesgpearce/flow,claudiopro/flow,AgentME/flow,nmote/flow,samwgoldman/flow,claudiopro/flow,popham/flow