Helper class for supporting the GB9c rule in Unicode Text Segmentation TR29

GB9c Do not break within certain combinations with Indic_Conjunct_Break (InCB)=Linker. \p{InCB=Consonant} [ \p{InCB=Extend} \p{InCB=Linker} ]* \p{InCB=Linker} [ \p{InCB=Extend} \p{InCB=Linker} ]* x \p{InCB=Consonant}*

Code point conditions included in this class are derived from the "Derived Property: Indic_Conjunct_Break" section in DerivedCoreProperties.txt of the Unicode Character Database.