BaseTools/tools_def.template: bump minimum required NASM versions

NASM had been unable to assemble segment register operations before the
following git commit:

  http://repo.or.cz/nasm.git/commitdiff/21d4ccc3c338

That commit was first released in NASM 2.10:

  http://repo.or.cz/nasm.git/commitdiff/ff62f33da0a2

This makes NASM 2.07 unusable for edk2 in general, because now we have a
lot of X64 assembly code that works with segment registers. For example
in:

  UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/ExceptionHandlerAsm.nasm

Bump the minimum required version to 2.10, for use with GCC toolchains.

Furthermore, list NASM 2.12.01 as a requirement for all other toolchains.
In particular, for source level debugging, VS20xx requires CodeView 8
debug symbols, and only NASM 2.12.01 and later produce those. (Suggested
by Liming, Mike, and Andrew.)

Cc: Andrew Fish <afish@apple.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Ref: http://thread.gmane.org/gmane.comp.bios.edk2.devel/14612
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>

BaseTools/Conf/tools_def.template

@@ -708,7 +708,9 @@ DEFINE SOURCERY_CYGWIN_TOOLS = /cygdrive/c/Program Files/CodeSourcery/Sourcery G
 #
 # Other Supported Tools
 # =====================
-#   NASM 2.07 or later                 http://www.nasm.us/
+#   NASM -- http://www.nasm.us/
+#   - NASM 2.10 or later for use with the GCC toolchain family
+#   - NASM 2.12.01 or later for use with all other toolchain families
 #
 ####################################################################################
 ####################################################################################