Fix build reproducibility

https://tracker.debian.org/pkg/tarantool

Does not build reproducibly during testing
A package building reproducibly enables third parties to verify that the source matches the distributed binaries. It has been identified that this source package produced different results, failed to build or had other issues in a test environment. Please read about how to improve the situation!

https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/tarantool.html
https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/diffoscope-results/tarantool.html

95  /​**·​C·​compile·​flags·​used·​to·​build·​Tarantool·​*/​    95  /​**·​C·​compile·​flags·​used·​to·​build·​Tarantool·​*/​
96  #define·​TARANTOOL_C_FLAGS·​"-​g·​-​O2·​-​fdebug-​prefix-​map=/​build-​1st/​tarantool-​1.​7.​2.​29.​g2ad1af9=.​·​-​Wformat·​-​Werror=format-​security·​-​Wdate-​time·​-​D_FORTIFY_SOURCE=2·​-​fexceptions·​-​funwind-​tables·​-​fno-​omit-​frame-​pointer·​-​fno-​stack-​protector·​-​fno-​common·​-​fopenmp·​-​msse2·​-​std=c11·​-​Wall·​-​Wextra·​-​Wno-​strict-​aliasing·​-​fno-​gnu89-​inline"    96  #define·​TARANTOOL_C_FLAGS·​"-​g·​-​O2·​-​fdebug-​prefix-​map=/​build-​2nd/​tarantool-​1.​7.​2.​29.​g2ad1af9=.​·​-​Wformat·​-​Werror=format-​security·​-​Wdate-​time·​-​D_FORTIFY_SOURCE=2·​-​fexceptions·​-​funwind-​tables·​-​fno-​omit-​frame-​pointer·​-​fno-​stack-​protector·​-​fno-​common·​-​fopenmp·​-​msse2·​-​std=c11·​-​Wall·​-​Wextra·​-​Wno-​strict-​aliasing·​-​fno-​gnu89-​inline"
97  /​**·​CXX·​compile·​flags·​used·​to·​build·​Tarantool·​*/​  97  /​**·​CXX·​compile·​flags·​used·​to·​build·​Tarantool·​*/​
98  #define·​TARANTOOL_CXX_FLAGS·​"-​g·​-​O2·​-​fdebug-​prefix-​map=/​build-​1st/​tarantool-​1.​7.​2.​29.​g2ad1af9=.​·​-​Wformat·​-​Werror=format-​security·​-​Wdate-​time·​-​D_FORTIFY_SOURCE=2·​-​fexceptions·​-​funwind-​tables·​-​fno-​omit-​frame-​pointer·​-​fno-​stack-​protector·​-​fno-​common·​-​fopenmp·​-​msse2·​-​std=c++11·​-​Wall·​-​Wextra·​-​Wno-​strict-​aliasing·​-​Wno-​invalid-​offsetof"    98  #define·​TARANTOOL_CXX_FLAGS·​"-​g·​-​O2·​-​fdebug-​prefix-​map=/​build-​2nd/​tarantool-​1.​7.​2.​29.​g2ad1af9=.​·​-​Wformat·​-​Werror=format-​security·​-​Wdate-​time·​-​D_FORTIFY_SOURCE=2·​-​fexceptions·​-​funwind-​tables·​-​fno-​omit-​frame-​pointer·​-​fno-​stack-​protector·​-​fno-​common·​-​fopenmp·​-​msse2·​-​std=c++11·​-​Wall·​-​Wextra·​-​Wno-​strict-​aliasing·​-​Wno-​invalid-​offsetof" 

=> filter CFLAGS

Start with the Debian package page and the reproducible-builds report for tarantool, then inspect the diffoscope output to confirm which generated files differ. Trace where TARANTOOL_C_FLAGS and TARANTOOL_CXX_FLAGS are produced, and verify the build twice with the differing build paths; done means the package passes the reproducibility test without embedding those differences.