Use dynamic buffers for gethostent/gethostbyname/gethostbyaddr
Use dynamic buffers for gethostent/gethostbyname/gethostbyaddr

 Save ~1k static space (.bss)

   text    data     bss     dec     hex filename
-    68       0     126     194      c2 libc/inet/gethostent.os
-    79       0     460     539     21b libc/inet/gethostbyname2.os
-    83       0     460     543     21f libc/inet/gethostbyaddr.os
+    98       0      24     122      7a libc/inet/gethostent.os
+   110       0      24     134      86 libc/inet/gethostbyname2.os
+   113       0      24     137      89 libc/inet/gethostbyaddr.os
==================================================================
    +91            -974

Signed-off-by: Leonid Lisovskiy <66c38905dfb44479707f7ccea5c07862e8cf461c@gmail.com>

wbx-github/uclibc-ng,brgl/uclibc-ng,brgl/uclibc-ng,foss-for-synopsys-dwc-arc-processors/uClibc,wbx-github/uclibc-ng,brgl/uclibc-ng,kraj/uclibc-ng,kraj/uclibc-ng,kraj/uclibc-ng,foss-for-synopsys-dwc-arc-processors/uClibc,wbx-github/uclibc-ng,foss-for-synopsys-dwc-arc-processors/uClibc,brgl/uclibc-ng,foss-for-synopsys-dwc-arc-processors/uClibc,kraj/uclibc-ng,wbx-github/uclibc-ng