protobuf: replace spaces with tabs in recipe
protobuf: replace spaces with tabs in recipe

The recipe uses 4 spaces instead of tabs when indenting.  The recipe
style guidelines indicate that tabs should be used instead.  This
simple fix replaces the spaces with tabs where appropriate in the
recipe file.

Signed-off-by: Keith Holman <9791a5b46d02846502078d9536196dc2bd53b001@windriver.com>
Signed-off-by: Bruce Ashfield <284cc737d174a260eec2a2a6324a304f84b1ae0f@windriver.com>

cjp256/meta-virtualization,fbertux/meta-virtualization,cardoe/meta-virtualization,lgirdk/meta-virtualization,cardoe/meta-virtualization,lgirdk/meta-virtualization,rcwoolley/meta-virtualization,lgirdk/meta-virtualization,lgirdk/meta-virtualization,cjp256/meta-virtualization,cardoe/meta-virtualization,fbertux/meta-virtualization,cjp256/meta-virtualization,lgirdk/meta-virtualization,fbertux/meta-virtualization