Small update to brotli specification.
Small update to brotli specification.

Clarify how to recover from error conditions caused by overflowing
block types and symbol values.

android-ia/platform_external_chromium_org_third_party_brotli_src,Omegaphora/external_chromium_org_third_party_brotli_src,robryk/font-compression-reference,robryk/font-compression-reference,CyanogenMod/android_external_chromium_org_third_party_brotli_src,android-ia/platform_external_chromium_org_third_party_brotli_src,google/woff2,AOSPU/external_chromium_org_third_party_brotli_src,CyanogenMod/android_external_chromium_org_third_party_brotli_src,MIPS/external-chromium_org-third_party-brotli-src,CyanogenMod/android_external_chromium_org_third_party_brotli_src,Omegaphora/external_chromium_org_third_party_brotli_src,bpsinc-native/src_third_party_brotli_src,bpsinc-native/src_third_party_brotli_src,seanjensengrey/font-compression-reference,anthrotype/woff2,MIPS/external-chromium_org-third_party-brotli-src,rsheeter/woff2,Omegaphora/external_chromium_org_third_party_brotli_src,khaledhosny/woff2,bxchusun/le-huong-van,AOSPU/external_chromium_org_third_party_brotli_src,MIPS/external-chromium_org-third_party-brotli-src,bxchusun/le-huong-van,AOSPU/external_chromium_org_third_party_brotli_src,robryk/font-compression-reference,bxchusun/le-huong-van,bpsinc-native/src_third_party_brotli_src,seanjensengrey/font-compression-reference,bxchusun/le-huong-van,android-ia/platform_external_chromium_org_third_party_brotli_src,seanjensengrey/font-compression-reference