added template for Xilinx

Co-Authored-By: lkxajd <lkxajd@163.com>
Co-Authored-By: Shamim Keshani <sh.keshani@gmail.com>
Co-Authored-By: Stephen <stephengroat@users.noreply.github.com>

community/Xilinx.gitignore

+# gitignore template for Xilinx Vivado Design Suite
+# website: https://www.xilinx.com/support/download.html
+
+# [home]
+*.jou
+*.log
+*.debug
+*.str
+*.zip
+*.tmp
+*.rst
+*.os
+*.js
+*.pb
+*.dcp
+*.hwdef
+*.vds
+*.veo
+*.wdf
+*.vdi
+*.dmp
+*.rpx
+*.rpt
+*_stub.v
+*_stub.vhdl
+*_funcsim.v
+*_funcsim.vhdl
+.project
+
+# [dir]
+*.cache
+.metadata
+*.data
+*.ipdefs
+.Xil
+*.sdk
+*.hw
+*.ip_user_files
+
+### IP synth
+*_synth_*
+
+.jobs
+
+### project synth
+*/*.runs/synth*/*.xml
+*/*.runs/synth*/*.txt
+*/*.runs/synth*/*.sh
+*/*.runs/synth*/*.tcl
+*/*.runs/synth*/*.bat
+*/*.runs/synth*/*.xdc
+!*/*.runs/synth*/*utilization*.rpt
+
+*.runs/synth*/*.xml
+*.runs/synth*/*.txt
+*.runs/synth*/*.sh
+*.runs/synth*/*.tcl
+*.runs/synth*/*.bat
+*.runs/synth*/*.xdc
+!*.runs/synth*/*utilization*.rpt
+
+### project impl
+*/*.runs/impl*/*.xml
+*/*.runs/impl*/*.html
+*/*.runs/impl*/*.txt
+*/*.runs/impl*/*.sh
+*/*.runs/impl*/*.tcl
+*/*.runs/impl*/*.bat
+!*/*.runs/impl*/*utilization*.rpt
+
+*.runs/impl*/*.xml
+*.runs/impl*/*.html
+*.runs/impl*/*.txt
+*.runs/impl*/*.sh
+*.runs/impl*/*.tcl
+*.runs/impl*/*.bat
+!*.runs/impl*/*utilization*.rpt
+
+### block design
+*/*/bd/*/hdl
+*/*/*/bd/*/hdl
+
+*/*/bd/*/*.xdc
+*/*/*/bd/*/*.xdc
+
+*/*/bd/*/ip/*/*.xdc
+*/*/*/bd/*/ip/*/*.xdc
+
+*/*/bd/*/ip/*/*/
+*/*/*/bd/*/ip/*/*/
+
+*/*/bd/*/ip/*/*.vhd
+*/*/*/bd/*/ip/*/*.vhd
+
+*/*/bd/*/ip/*/*.xml
+*/*/*/bd/*/ip/*/*.xml
+
+*.c
+*.h
+*.vho
+*.html
+*/*/bd/*/ip/*/*.tcl
+*/*/*/bd/*/ip/*/*.tcl
+hw_handoff
+ipshared