1.0.48.34: MAKE-ALIEN-STRING

1.0.48.34: MAKE-ALIEN-STRING

 An easy way to copy lisp strings to malloc'ed memory.

 I can't believe we didn't have this before. ...just seems
 insane. I keep expecting to find a nice way to do this
 squirreled away somewhere in SB-ALIEN. Here's hoping I won't
 embarrass myself by finding one.

 Also fix the OAOOM in MAKE-ALIEN and FREE-ALIEN documentation: make
 the docstrings the canonical versions, and include them in the
 manual.