dev-cmd/bump-formula-pr: search for tar
dev-cmd/bump-formula-pr: search for tar

We first search for gtar in PATH, then
check if Homebrew's gtar is available,
then finally search for tar in PATH.

Signed-off-by: Bob W. Hogg <c772a964fd55352a3510e5d535dd9ccc9ac30168@linux.com>

amar-laksh/brew_sudo,mahori/brew,vitorgalvao/brew,amar-laksh/brew_sudo,Linuxbrew/brew,reitermarkus/brew,pseudocody/brew,EricFromCanada/brew,reitermarkus/brew,nandub/brew,jmsundar/brew,sjackman/homebrew,maxim-belkin/brew,MikeMcQuaid/brew,mgrimes/brew,ilovezfs/brew,EricFromCanada/brew,ilovezfs/brew,reitermarkus/brew,Linuxbrew/brew,EricFromCanada/brew,JCount/brew,aw1621107/brew,EricFromCanada/brew,reelsense/brew,Linuxbrew/brew,sjackman/homebrew,MikeMcQuaid/brew,pseudocody/brew,mahori/brew,MikeMcQuaid/brew,DomT4/brew,ilovezfs/brew,hanxue/linuxbrew,mgrimes/brew,konqui/brew,gregory-nisbet/brew,sjackman/homebrew,claui/brew,Homebrew/brew,aw1621107/brew,Homebrew/brew,reitermarkus/brew,palxex/brew,palxex/brew,jmsundar/brew,jmsundar/brew,Homebrew/brew,Homebrew/brew,mahori/brew,maxim-belkin/brew,claui/brew,alyssais/brew,nandub/brew,amar-laksh/brew_sudo,sjackman/homebrew,DomT4/brew,DomT4/brew,alyssais/brew,alyssais/brew,nandub/brew,Linuxbrew/brew,nandub/brew,hanxue/linuxbrew,reelsense/brew,JCount/brew,JCount/brew,vitorgalvao/brew,DomT4/brew,gregory-nisbet/brew,hanxue/linuxbrew,mgrimes/brew,pseudocody/brew,konqui/brew,aw1621107/brew,mahori/brew,claui/brew,MikeMcQuaid/brew,palxex/brew,konqui/brew,maxim-belkin/brew,gregory-nisbet/brew,claui/brew,reelsense/brew,vitorgalvao/brew,konqui/brew,JCount/brew,vitorgalvao/brew