science/simlib: Fix build

- Doesn't build with Clang 6

errors.cc:14:42: error: invalid suffix on literal; C++11 requires a space between
      literal and identifier [-Wreserved-user-defined-literal]
/* 0 */ "SIMLIB/C++ Simulation Library, "SIMLIB_COPYRIGHT"\0"
                                         ^

http://beefy12.nyi.freebsd.org/data/head-amd64-default/p473790_s335878/logs/simlib-3.02_1.log

- nm crashes during the build on FreeBSD >= 11.1.  Use binutils
  from ports as a workaround. [1]

Assertion failed: (ddata->output.size > 0), function cpp_demangle_read_sname, file /usr/src/contrib/elftoolchain/libelftc/libelftc_dem_gnu3.c, line 2137.

http://beefy9.nyi.freebsd.org/data/111amd64-default/473790/logs/simlib-3.02_1.log

PR:		223333 [1]

science/simlib/Makefile

@@ -20,6 +20,15 @@ CXXFLAGS+=	-fPIC
 NOT_FOR_ARCHS=		aarch64 armv6 armv7 mips mips64 powerpc powerpc64 sparc64
 NOT_FOR_ARCHS_REASON=	contains not working ${ARCH}-dependent assembly code
 
+.include <bsd.port.options.mk>
+
+.if ${OPSYS} == FreeBSD && ${OSVERSION} >= 1101000
+# nm crashes during the build:
+# Assertion failed: (ddata->output.size > 0), function cpp_demangle_read_sname, file /usr/src/contrib/elftoolchain/libelftc/libelftc_dem_gnu3.c, line 2137.
+USE_BINUTILS=	yes
+BINARY_ALIAS=	nm=${NM}
+.endif
+
 post-patch:
 	@${REINPLACE_CMD} -e 's|make|gmake|g' ${WRKSRC}/Makefile
 	@${REINPLACE_CMD} -e 's#%%PREFIX%%#${PREFIX}#g' \

science/simlib/files/patch-src_errors.txt

@@ -0,0 +1,13 @@
+src/errors.txt is used to generate src/errors.cc
+
+--- src/errors.txt.orig	2018-07-07 20:48:53 UTC
++++ src/errors.txt
+@@ -14,7 +14,7 @@ _ErrMsg(_ErrEnum)
+ 
+ ////////////////////////////////////////////////////////////////////////////
+ 
+-Copyright               SIMLIB/C++ Simulation Library, "SIMLIB_COPYRIGHT"
++Copyright               SIMLIB/C++ Simulation Library, " SIMLIB_COPYRIGHT "
+ UnknownError            Undocumented error
+ InternalError           Internal error
+ MemoryError             No memory