im: allow hybrid builds and other cleanups

* Fix tecmake to set a soname for the libraries

This currenly fails strict-policy checks because the package doesn't
depend on libstdc++.so, but this should be in haiku$secondaryArchSuffix.
I also had to explicitly depend on the proper version of as, otherwise
the one for gcc2 would be picked up. I suspect one of the dependencies
is wrong, but attempts to use haikuporter --why have failed.

media-libs/im/patches/im-3.8.patchset

@@ -1,4 +1,4 @@
-From 6421d3e8c775ddb4477f4418a983d5bfa2b901f0 Mon Sep 17 00:00:00 2001
+From 8fa357e184a5b8892e9355a85368803dde4f7d01 Mon Sep 17 00:00:00 2001
 From: Adrien Destugues <pulkomandy@pulkomandy.tk>
 Date: Thu, 14 Nov 2013 21:46:53 +0100
 Subject: Make tecmake aware of Haiku and the lack of libm.
@@ -21,7 +21,7 @@ index cc89349..fc982e0 100755
  }
  
 diff --git a/tecmake.mak b/tecmake.mak
-index f799a07..7ee8895 100755
+index f799a07..c955869 100755
 --- a/tecmake.mak
 +++ b/tecmake.mak
 @@ -26,6 +26,9 @@ ifndef TEC_UNAME
@@ -34,7 +34,19 @@ index f799a07..7ee8895 100755
    ifeq ($(TEC_SYSNAME), SunOS)
      TEC_SYSARCH:=$(shell uname -p)
    endif
-@@ -1177,7 +1180,9 @@ ifdef USE_X11
+@@ -526,6 +529,11 @@ ifneq ($(findstring Linux, $(TEC_UNAME)), )
+   endif
+ endif
+ 
++ifneq ($(findstring Haiku, $(TEC_UNAME)), )
++  UNIX_POSIX = Yes
++  STDLDFLAGS := -shared -Wl,-soname=lib$(TARGETNAME).so
++endif
++
+ ifneq ($(findstring IRIX, $(TEC_UNAME)), )
+   UNIX_POSIX = Yes
+   ifndef NO_LOCAL_LD
+@@ -1177,7 +1185,9 @@ ifdef USE_X11
    STDINCS += $(X11_INC)
  endif