[docs] Add ReST version of all the man pages.

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+llvm-nm - list LLVM bitcode file's symbol table
+===============================================
+
+
+SYNOPSIS
+--------
+
+
+**llvm-nm** [*options*] [*filenames...*]
+
+
+DESCRIPTION
+-----------
+
+
+The **llvm-nm** utility lists the names of symbols from the LLVM bitcode files,
+or **ar** archives containing LLVM bitcode files, named on the command line.
+Each symbol is listed along with some simple information about its provenance.
+If no file name is specified, or *-* is used as a file name, **llvm-nm** will
+process a bitcode file on its standard input stream.
+
+**llvm-nm**'s default output format is the traditional BSD **nm** output format.
+Each such output record consists of an (optional) 8-digit hexadecimal address,
+followed by a type code character, followed by a name, for each symbol. One
+record is printed per line; fields are separated by spaces. When the address is
+omitted, it is replaced by 8 spaces.
+
+Type code characters currently supported, and their meanings, are as follows:
+
+
+U
+
+ Named object is referenced but undefined in this bitcode file
+
+
+
+C
+
+ Common (multiple definitions link together into one def)
+
+
+
+W
+
+ Weak reference (multiple definitions link together into zero or one definitions)
+
+
+
+t
+
+ Local function (text) object
+
+
+
+T
+
+ Global function (text) object
+
+
+
+d
+
+ Local data object
+
+
+
+D
+
+ Global data object
+
+
+
+?
+
+ Something unrecognizable
+
+
+
+Because LLVM bitcode files typically contain objects that are not considered to
+have addresses until they are linked into an executable image or dynamically
+compiled "just-in-time", **llvm-nm** does not print an address for any symbol,
+even symbols which are defined in the bitcode file.
+
+
+OPTIONS
+-------
+
+
+
+**-P**
+
+ Use POSIX.2 output format. Alias for **--format=posix**.
+
+
+
+**-B**    (default)
+
+ Use BSD output format. Alias for **--format=bsd**.
+
+
+
+**-help**
+
+ Print a summary of command-line options and their meanings.
+
+
+
+**--defined-only**
+
+ Print only symbols defined in this bitcode file (as opposed to
+ symbols which may be referenced by objects in this file, but not
+ defined in this file.)
+
+
+
+**--extern-only**, **-g**
+
+ Print only symbols whose definitions are external; that is, accessible
+ from other bitcode files.
+
+
+
+**--undefined-only**, **-u**
+
+ Print only symbols referenced but not defined in this bitcode file.
+
+
+
+
+ Select an output format; *fmt* may be *sysv*, *posix*, or *bsd*. The
+ default is *bsd*.
+
+
+
+
+BUGS
+----
+
+
+**llvm-nm** cannot demangle C++ mangled names, like GNU **nm** can.
+
+
+EXIT STATUS
+-----------
+
+
+**llvm-nm** exits with an exit code of zero.
+
+
+SEE ALSO
+--------
+
+
+llvm-dis|llvm-dis, ar(1), nm(1)