BaseTools/AutoGen: GenMake response file quotes strings

[mdkinney]

Description

If command line options are moved into a response file of a GCC family build, then the file path separators are converted from '\' to '/'. However, this can corrupt command line options that are quoted strings.

Update GenMake to no convert '\' to '/' in quoted strings.

• Breaking change?
• Impacts security?
• Includes tests?

How This Was Tested

Added CC_FLAGS to EmulatorPkg build to increase line length to force response file generation and added additional command line parameters with various file paths and quoted strings:

Input	Before Change	Correct	After Change
"Hello"	"Hello"	YES	"Hello"
L\"Hello\"	L/"Hello/"	NO	L\"Hello\"
"a/b/c/d"	"a/b/c/d"	YES	"a/b/c/d"
"a\b\c\d"	"a/b/c/d"	NO	"a\b\c\d"
L\"a/b/c/d\"	L/"a/b/c/d/"	NO	L\"a/b/c/d\"
L\"a\b\c\d\"	L/"a/b/c/d/"	NO	L\"a\b\c\d\"
a/b/c/d	a/b/c/d	YES	a/b/c/d
a\b\c\d	a/b/c/d	YES	a/b/c/d

Integration Instructions

N/A