Bump up version major

Before v1.15.0: c=10, a=1, r=0

Rule #3: source code has changed, increment r:
r=1

Rule #4: interfaces were removed in vpx_tpl.h, set r=0, increment c:
c=11, r=0

Rule #5: no interfaces have been added

Rule #6: interfaces were removed in vpx_tpl.h, set a=0:
a=0

After release: c=11, a=0, r=0

major = c-a = 11
minor = a = 0
patch = r = 0

Bug: webm:384672478
Change-Id: I2e70e7e35c64ece32eaf1dc5625640965483f9b9

libs.mk

@@ -313,8 +313,8 @@ $(BUILD_PFX)libvpx_g.a: $(LIBVPX_OBJS)
 # To determine SO_VERSION_{MAJOR,MINOR,PATCH}, calculate c,a,r with current
 # SO_VERSION_* then follow the rules in the link to detemine the new version
 # (c1, a1, r1) and set MAJOR to [c1-a1], MINOR to a1 and PATCH to r1
-SO_VERSION_MAJOR := 9
-SO_VERSION_MINOR := 1
+SO_VERSION_MAJOR := 11
+SO_VERSION_MINOR := 0
 SO_VERSION_PATCH := 0
 ifeq ($(filter darwin%,$(TGT_OS)),$(TGT_OS))
 LIBVPX_SO               := libvpx.$(SO_VERSION_MAJOR).dylib