GH Actions: install zlib1g-dev in the linux_ubuntu_7_10 job

Author: generalmimon

.github/workflows/build.yml

@@ -74,7 +74,7 @@ jobs:
           docker start u710
       - name: restore
         run: |
-          docker exec u710 sh -c 'pwd && ls -al && apt-get update && apt-get -y --no-install-recommends install make g++'
+          docker exec u710 sh -c 'pwd && ls -al && apt-get update && apt-get -y --no-install-recommends install make g++ zlib1g-dev'
       - name: build
         run: |
           docker exec u710 sh -c 'make -f gcc4.mk'

gcc4.mk

@@ -11,7 +11,7 @@ OBJS := \
 	$(BUILD_DIR)/kaitaistream.o \
 	$(BUILD_DIR)/unittest.o
 
-DEFINES := -DKS_STR_ENCODING_ICONV -DGTEST_NANO
+DEFINES := -DKS_STR_ENCODING_ICONV -DKS_ZLIB -DGTEST_NANO
 
 LDFLAGS :=
 LDLIBS :=