Import newlib and create makefile

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+*** Major changes in newlib version 1.8.1:
+
+* Added check for --enable-newlib-mb configure option which defines the
+  MB_CAPABLE macro.  Multibyte support for JIS, SJIS, and EUC-JP implemented.
+
+* Reduced code size for libm modules.
+
+* Replaced the BSD malloc with Doug Lea's malloc.
+
+*** Major changes in newlib version 1.8.0:
+
+* Added simulated signal handling functions _raise_r, _signal_r, raise, and
+  signal except for sparc-sun-sunos*, i[3456]86-*-sco*, and a29k-*-* systems,
+  which already provide access to signal.  The signal functionality provided
+  does not interact with hardware generated signals.
+    
+* Added reentrant function rand_r from POSIX.1c.
+
+* Removed _asctime, _next, _scanpoint, and _signgam fields from struct
+  _reent.  These are no longer necessary since there are now functions
+  that explictly support multiple threads (asctime_r, ctime_r, gamma_r,
+  gmtime_r, lgamma_r, localtime_r, rand_r, & strtok_r).
+
+
+*** Major changes in newlib version 1.7.0:
+
+* Cross compiler target libraries are now built in a subdir of the top level
+  build directory.
+
+  Old way: build
+                /newlib
+                       /m68020
+                              /m68881
+  New way:
+           build
+                /m68k-coff
+                          /m68020
+                                 /m68881
+
+  where m68020 and m68881 are multilib subdirectories
+
+* m68k targets support --disable options to avoid building unwanted versions
+  of the libraries.
+
+  --disable-softfloat - don't build libc, libg++, etc. for -msoft-float
+  --disable-m68881    - don't build libc, libg++, etc. for -m68881
+  --disable-m68000    - don't build libc, libg++, etc. for -m68000
+  --disable-m68020    - don't build libc, libg++, etc. for -m68020
+
+  These options have *no* effect on the default libraries, so if the default
+  is -m68020, --disable-m68020 is nilpotent.
+
+* Reentrancy support in libm removed.
+
+* strtok, strtol, strtoul, assert, div, ldiv, qsort, vfprintf
+  replaced with NetBSD versions.
+
+* Support for systems with 32 bit "doubles" added.
+
+* unctrl added.
+
+* dtoa.c updated from master dtoa.c soruces (netlib.att.com)
+
+* Various bug fixes.
+
+*** Major changes in newlib version 1.6.1:
+
+* Added reentrant functions (asctime_r, ctime_r, gmtime_r, localtime_r,
+and strtok_r) from POSIX.1c.
+
+* Removed _asctime_r and _strtok_r functions.