Add LLVM 7.0 config generation script
Add LLVM 7.0 config generation script

Change-Id: Ic67a43f5090c5004324ab300ce799c1206f3c4e3
Reviewed-on: https://swiftshader-review.googlesource.com/20473
Tested-by: Logan Chien <54d97d247ead2e88f9d88f287e98620efa682c55@google.com>
Reviewed-by: Nicolas Capens <51edc787c30f24c4904e8ffbb5523c3a9f7a451d@google.com>

bkaradzic/SwiftShader,bkaradzic/SwiftShader,google/swiftshader,bkaradzic/SwiftShader,bkaradzic/SwiftShader,google/swiftshader,google/swiftshader,bkaradzic/SwiftShader