[oe] Mesa packages and TLS

[Søren Holm]

Hi

After I startet using mesa >=7.4 at lest the mesa-packages actually compiles. Which is 
good. Nevertheless there still are problems. Apparently the TLS support which is currently 
disables on uclibc targets is also broken on glibc. At lest I get the following when 
running glxgears.

/usr/lib/dri/swrast_dri.so: undefined symbol: _glapi_tls_Context)

Removing the line "inherit glx-use-tls" in mesa-common.inc makes software-rendering work 
again.

/Søren Holm